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POWR-GARD POWR-GARD
TM
PRODUCTS SELECTION
GUIDE Littelfuse
®
Worldwide
Littelfuse is an international corporation dedicated and
committed to serving customers with innovative circuit
protection products that consistently surpass commonly
accepted performance standards. With sales, service
and distribution centers in the United States, United
Kingdom, The Netherlands, Singapore, Japan, Korea,
China and Brazil, product accessibility and design sup-
port is available to equipment manufacturers, buildings,
plants and construction sites around the world.
2
Contents
POWR-PRO Specification Grade Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
General Purpose Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Midget/Electronic/Automotive Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Medium Voltage Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Telecom Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Special Purpose Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Semiconductor Fuses & Holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
International Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Fuse Holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Miscellaneous Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Overvoltage Suppression Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
This publication is meant to serve as a guide only for product selection. Please consult complete product catalogs or the factory for more detailed information.
Total Solution Provider
Total Solutions
Littelfuse offers the broadest line of circuit protection products in the world for both overcurrent and overvoltage applications.
Technologies include fuses, resettable PTCs, ESD suppressors, tyristors, gas tubes, diodes, and MOVs. As the leading glob-
al provider of circuit protection devices for the electrical, electronic, and automotive industries, we deliver the innovation,
expertise, quality and service you expect from an industry leader.
Product Innovation
Littelfuse offers innovative solutions based on extensive
research and development, and an uncompromising approach
to quality. We continue to enhance our products and manufac-
turing processes to stay on the leading edge of technology.
Littelfuse holds several patents on overcurrent and overvoltage
devices and is always developing new products to meet ever-
increasing needs for circuit protection. Innovative products such
as the award winning Indicator
TM
series of fuses makes
Littelfuse the world leader in circuit protection. CCMR Series Class CC/CD
The CCMR series POWR-PRO
®
CC fuses are
true dual element, time-delay fuses specifically
engineered for space-saving motor branch cir-
cuit protection. These fuses are recommended
for motor circuits up to 40 HP and for general
purpose circuits up to 60 amps.
Voltage Rating:
600 VAC (contact factory for DC volt-
ages)
Interrupting Rating:
300,000 AC amperes
Ampere Range:
2/10 - 60 amperes
Time Delay
KLPC Series CLASS L
KLPC series POWR-PRO
®
fuses pro-
vide ideal overcurrent protection for
service switches, switchboard mains
and feeders, bolted pressure contact
switches, motor control centers, trans-
formers, power circuit protection, and
other applications requiring 200 - 6000
ampere fuses.
Voltage Rating:
600 VAC / 480 VDC
Interrupting Rating:
300,000 AC / 20,000 DC
amperes
Ampere Range:
200 - 6000 amperes
Time Delay
LLSRK_ID Series CLASS RK1
Littelfuse LLSRK_ID series fuse is the
most advanced Class RK1 fuse avail-
able today providing unparalleled per-
formance and protection to modern cir-
cuits. The patented Indicator
TM
technol-
ogy provides instant identification of a
blown fuse greatly enhancing system
uptime, while the precision formed
short circuit elements virtually eliminate
damage to components from unexpect-
ed electrical faults.
Voltage Rating:
600 VAC / 300 VDC
Interrupting Rating:
200,000 AC amperes
300,000 AC amperes (Littelfuse self-certified)
20,000 DC amperes
Ampere Range:
1/10 - 600 amperes
Time Delay
LLNRK / LLSRK Series CLASS RK1
Littelfuse LLNRK and LLSRK
series POWR-PRO
®
fuses provide
superior overload and short circuit pro-
tection for general purpose
(service entrance, main, feeder, and
branch) circuits and for circuits with high
inrush currents (motors, transformers,
and solenoids).
Voltage Rating:
250 VAC / 125 VDC (LLNRK)
600 VAC / 300 VDC (LLSRK)
Interrupting Rating:
300,000 AC / 20,000 DC amperes
Ampere Range:
1/10 - 600 amperes
Time Delay
JTD_ID Series CLASS J
The Littelfuse JTD Indicator fuse
provides visual indication when the
fuse has blown and maximum pro-
tection in a compact package. Ideal
for use with motors, transformers,
solenoids, and general purpose cir-
cuits with limited space.
Voltage Rating:
600 VAC (contact factory for DC
voltages)
Interrupting Rating:
300,000 AC amperes (Littelfuse
self-certified)
Ampere Range:
8/10 - 600 amperes
Time Delay
LDC Series CLASS L
LDC series fuses are the first UL Listed 600
volts AC and DC Class L fuse. They are recom-
mended for UPS protection, DC distribution, DC
variable speed drives, crane rail circuits and
other large DC equipment, mass transit sys-
tems, and general purpose main, feeder, and
branch circuits.
Voltage Rating:
600 VAC / 600 VDC
Interrupting Rating:
200,000 AC / 50,000 DC amperes
Ampere Range:
150 - 2000 amperes
Time Delay
Sample part number: KLPC 1000
KLPC replaces competitors: KRPC, A4BQ
Sample part number: CCMR 40
CCMR replaces competitors: LPCC, ATDR
Sample part number: LLNRK 450
LLNRK replaces competitors: LPNRK, A2DR
LLSRK replaces competitors: LPSRK, A6DR
Sample part number: LLSRK450ID
LLSRK_ID replaces competitors: LPSRK, A6DR
Sample part number: JTD60ID
JTD replaces competitors: LPJ, AJT
Sample part number: LDC 1200
®
UL
®
®
UL
®
®
UL
®
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UL
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UL
®
®
UL
®
3
POWR-PRO Specification Grade Fuses FLNR_ID/FLSR_ID Series CLASS RK5
The Littelfuse FLNR_ID and FLSR_ID
Indicator fuses provide visual indication
when the fuse has blown, reducing down
time and increasing safety. Ideal for use
with all general-purpose circuits, motors,
transformers, solenoids, fluorescent light-
ing, and all system components with high
inrush currents.
Voltage Rating:
250 VAC / 250 VDC (FLNR_ID)
600 VAC / 300 VDC (FLSR_ID)
Interrupting Rating:
200,000 AC / 20,000 DC amperes
Ampere Range: 1/10 - 600 amperes
Time Delay
KLLU Series CLASS L
The general purpose KLLU Class L fuse pro-
vides high quality protection at a slightly lower
cost than the POWR-PRO KLPC version. These
fuses are recommended for use in service
switches, switchboard mains and feeders, bolted
pressure contact switches, motor control center
mains, and large motor branch circuits.
Voltage Rating:
600 VAC (contact factory for DC voltages)
Interrupting Rating:
200,000 AC amperes
Ampere Range:
601 - 4000 amperes
Time Delay
KLDR/KLKR Series CLASS CC
Three types of Class CC fuses provide pro-
tection for a variety of components. The
KLDR series fuses are designed to withstand
the high magnetizing inrush of transformers.
The KLKR series fuses are used to protect
equipment requiring fast response to faults.
(Refer to the POWR-PRO section for informa-
tion on the CCMR series motor protection
fuses).
Voltage Rating: 600 VAC / 300 VDC
Interrupting Rating: 200,000 AC / 20,000 DC amperes
Ampere Range: 1/10 - 30 amperes
Time Delay: KLDR series
Fast Acting: KLKR series
KLNR/KLSR Series CLASS RK1
The KLNR/KLSR series Class RK1 fuses
are extremely current limiting and pro-
vide fast-acting overload and short-circuit
protection. They are recommended for
use with resistance heaters, lighting cir-
cuits, and other non-inductive loads up
to 600 amperes.
Voltage Rating:
250 VAC / 125 VDC (KLNR)
600 VAC (KLSR) (contact factory for
DC voltages)
Interrupting Rating:
200,000 AC / 20,000 DC amperes
Ampere Range: 1 - 600 amperes
Fast Acting
JLS Series CLASS J
JLS series fuses provide space-saving,
fast-acting protection for non-inductive
loads. The fuse characteristics are similar
to the KLNR/KLSR series RK1 fuses, but
are much smaller in size. They are also
recommended for use wit